Electric-lamp glower and method of attaching terminal wires thereto.



No.v72 5,703. PATENTED APR,21,'1903. M. W. HANKS. ELECTRIC LAMP GLOWER AND METHOD OF ATTAGHING TERMINAL WIRES THERETO,

APPLICATION FILED 001. 31, 1902.

N0 MODEL.

Fig-i I IN VEIITUH ATTORNEY.

UNITED STATES PATENT OFFICE;

MARSHALL W. HANKS, OF PITTSBURG, PENNSYLVANIA, ASSIGNOR TO GEORGE WESTINGHOUSE, OF PITTSBURG, PENNSYLVANIA.

ELECTRIC-LAMP GLOWER AND METHOD OF ATTACHlNG TERMINAL WIRES THERETO.

SPECIFICATION forming part Of Letters Patent No. 725,703, dated April 21, 1903. Application filedOotoberBl, 1302. Serial No.129,62 6. No model.)

To all whom it may concern.- were manufactured in large numbers. In

Beit known that I, MARSHALL W. HANKS, a order to obviate these difficulties, I have decitizen of the United States, residing at Pittsvised the method and product which constiburg, in the county of Allegheny and State of tute my present invention and which will be Pennsylvania, have invented a new and usenow described.

ful Improvement in Electric-LampGlowers Ifirst wind a portion of a platinum wire or and Methods of Attaching Terminal Wires cable l around each end of a length of glower- Thereto, of which the following is a specifica rod 2 in the form of a coil 3, the rod being tion. first baked or roasted and subjected to such 10 My invention relates to electric lamps of other treatment as may be necessary in order the type in which the light-emitting member to thoroughly shrink it. I then apply to each is composed of one or more dry electrolytes coil 321 small quantity of copper or other maand is a conductor only when heated to a terial which will fluxor alloy with the platicomparatively high temperature. num and heat the same to a high temperature [5 The object of my invention is to provide by means of a suitable flame. glowers of the character indicated with ter- As indicated in Fig. 3, the copper is apminal wires which shall be attached to the plied'by holding one end of a copper rod or ends of the glower-bodies in suchmanner as wire 4 in contact with the difierent portions to insure permanent rigid engagement thereof the coils 3land simultaneously subjecting 20 with. r the said parts to the flame of an oxyhydro- My invention is illustrated in the accompagen-burner 5 After the turns of wire 3 have nying drawings, in whichbeen thus treated they are coated with a body Figure 1 is a side elevation of a glowerof paste 6 of. a material like or similar to that blank. Fig. 2 is a similar view of a glowerof therod 2 and then baked and roasted in ac- 25 blank having terminal wires wound around cordance with the usual practice, the comthe ends thereof. Fig. 3 is a perspective view plete glower 7 being then ready for service.

of the parts shown in Fig. 2 and means for The intense heat produced by the glower applying alloying or fluxing material to one in service apparently volatilizes out the alloyof the terminal-wire coils. Fig. 4 is a view, ing-material which has been applied to. the

partially in side elevation 'and partially in turns 3 and leaves a spongy platinum contact section, of a completed glower; and Fig. 5 is between that portion of the platinum which a side elevation of a completed glower. is not alloyed with the copper and the glower- In the manufacture of glowers for electric rod, and this contact is so close and firm that lamps of the character above referred to it it is peculiarly efficient in service.

35 has been attempted to provide wireterminals Instead of applying the copper as indicated for attachment to the circuit-terminals of the in the drawings it may be applied to the terlamp by winding a platinum wire or twisted minal in powdered or comminnted form prior strands of such wire about each end of the to the application of the flame thereto to effect glower-body, then twisting together the free the fusing. Only a small amount of copper 4o ends of the wires, and finally covering the is necessary, since it is desirable to have the turns of wire with a coating of cement, like or alloy extend only a short distance into the similar to that constituting the bodyof the glower-rod and the coil of the platinum wire. glower. Difliculty has been experienced with My invention is not limited to the use of this form of terminal by reason of its tendcopper as an alloying material, since nickel,

45 ency to become loosened in service, particusilver, iron, emery, ma ngan'oxid, chrome-iron, 5 larly unless extreme care were taken in windand other materials may be utilized for this ing the wire around the vglowen-rod and also purpose with good results. in thoroughly shrinking the rod before ap- I claim as my inventionplying the wire. These difficulties were par- 1. The method of forming glower termi- 50 ticularly marked in cases where the glowers nals which consists in winding terminal wires I00 loying material to the turns of wire and subaround'the glower ends, then applying an aljecting the same to a high degree of heat.

2. The method of forming gloWer-terrninals which consists in winding platinum terminal wires around the glo wer ends, then applying copper to the turns of wire and subjecting the same to a flame the heat of which is sufficientto alloy the copper and platinum. 3. The method of forming glower-terminals which consists in winding platinum terminal wires around the glower ends, then applying an alloying material to the turns of wire and fusing or volatilizing the same and finally coating said wire-turns with a suitable paste.

4. An electric-lamp glower comprising a body composed of one or more dry electrolytes, platinum terminals Wound about the, glower MARSHALL W. HANKs.

Witnesses: v

HUGH ANDREW ORooKs, JNO. O. BOWEN. 

